Can I use hot water to remove grease from a wool sweater?

No, hot water can set the grease stain and shrink the wool. Always use cold water.

How long should I let baking soda sit on a grease stain?

Let baking soda sit for at least 30 minutes to absorb the grease, but longer is better for set-in stains.

What should I do if the grease stain doesn't come out?

If the stain persists after a few attempts, stop and take the sweater to a professional cleaner to avoid damaging the wool.

Can I use cornstarch instead of baking soda?

Yes, cornstarch can be used as an alternative to baking soda to absorb grease. Apply it the same way and let it sit for at least 30 minutes.

Is it safe to use dish soap on wool?

Yes, but use a mild dish soap and dilute it if possible. Harsh detergents can strip wool's natural oils, so always test on a hidden area first.

Laundry Stains

How to Get Grease Out of a Wool Sweater: Fresh and Set-In Stains

A practical guide to removing grease stains from a wool sweater using dish soap and baking soda. Includes wool-specific precautions, colorfastness testing, and step-by-step instructions.

Published August 10, 2026 Updated August 14, 2026 6 min read

Part 1: Material and risk

Grease on a wool sweater can feel like a disaster, but you can often lift it with items you already have at home. The key is to act quickly and treat the wool gently. This guide covers fresh and set-in grease stains on wool, with step-by-step instructions and important precautions.

What to Do First

If the grease is fresh, blot it immediately with a clean paper towel or cloth to absorb as much as possible. Do not rub, as that can push the grease deeper into the fibers.

Readers may also find How to Get Grease Out of a Silk Blouse: Fresh and Set-In Stains, How to Get Grease Out of a Linen Shirt: Fresh and Set-In Stains, and How to Get Grease Out of a Polyester Shirt: Fresh and Set-In Stains useful. For more stories like this, browse our Surface Safety section.

For set-in stains, start by gently scraping off any dried residue with a dull knife or spoon. Then, test your cleaning solution on an inconspicuous area of the sweater to ensure it doesn't cause color fading or damage.

How to Remove Fresh Grease from a Wool Sweater

Blot the stain: Place a clean paper towel under the stain and another on top. Press gently to absorb excess grease.
Apply dish soap: Put a small drop of mild dish soap directly on the stain. Gently work it in with your fingers or a soft-bristled brush.
Let it sit: Allow the dish soap to sit for 5-10 minutes to break down the grease.
Rinse with cold water: Rinse the area with cold water, keeping the sweater flat or supporting it to avoid stretching.
Launder as usual: Wash the sweater according to its care label, using cold water and a gentle cycle. Air dry flat.

How to Remove Set-In Grease from a Wool Sweater

Scrape off excess: Gently scrape any dried grease with a dull knife.
Apply baking soda: Sprinkle a generous amount of baking soda over the stain and let it sit for at least 30 minutes to absorb the grease.
Brush off: Brush off the baking soda with a soft brush or cloth.
Treat with dish soap: Apply a small amount of dish soap to the stain and gently work it in.
Soak in cold water: Soak the sweater in cold water for 30 minutes.
Rinse and wash: Rinse thoroughly and wash as recommended on the care label. Air dry flat.

What Not to Do

Do not use hot water: Hot water can set grease stains and shrink wool.
Do not rub vigorously: Rubbing can damage wool fibers and spread the stain.
Do not use bleach: Bleach can discolor or weaken wool.
Do not put in the dryer: Heat can set the stain and shrink the sweater. Always air dry.